std::acos

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Defined in header `<cmath>`

float acos( float arg );

double acos( double arg );

long double acos( long double arg );

Computes arc cosine of arg

arg - floating point value

arc sine of arg in radians in the range of [0; π] radians.

Domain error occurs if arg is outside the range [-1.0; 1.0]. NAN is returned in that case.

computes arc sine (

arcsin(x)

)
(function)

computes arc tangent (

arctan(x)

)
(function)

arc tangent, using signs to determine quadrants
(function)

computes cosine (

cos(x)

)
(function)